I just saw this news story on Google News:
Rare sexually transmitted disease found in NYC If you don't feel like reading the entire story, here are the most important parts:
"If left untreated, LGV can cause permanent damage to the bowels and permanent swelling and scarring of the genitals"
and,
"unprotected anal intercourse is a key risk factor in the spread of LGV"
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On a mostly unrelated note, earlier this week I added a vessel to a plan. The vessel's name was "Analipsi" and everytime I typed it, I thought to myself, "Hee hee, anal ipsi."